This carriage is the moving element of a recirculating ball linear guidance system, running on four rows of balls arranged in an X-configuration for load-bearing capacity in multiple directions. The KWVE20-B-SN-V1-G3 design is a narrow, low-profile carriage version, keeping overall width and height reduced compared to standard carriages. Net mass of the unit is 0.3 kg, and it is manufactured to accuracy class G3. The narrow, low-carriage geometry allows installation in applications where lateral and vertical space is limited, while the four-row ball arrangement provides load support from multiple directions on a single rail. Accuracy class G3 defines the dimensional and running tolerances of the carriage, which should be matched with a rail of the same accuracy class for consistent positioning performance. As with recirculating ball systems, correct lubrication of the raceways is required to maintain smooth operation of the ball recirculation path.